Martha is an ordinary girl, she has loving parents, a cat, studies and everything is fine. But one day, going down the stairs from her top floor on the way to school, she suddenly discovered that, for no apparent reason, an entire floor had disappeared in the entrance! An inquisitive girl managed to find out that disappearances do not happen every day, but only on Tuesdays! If Martha had known what this discovery would lead to, she would certainly have used only the elevator. But she did not do so, and on a September Tuesday, the mysterious and sinister Black Scissors sent Martha straight into the Cold River, from where she miraculously escaped thanks to the help of a familiar white dove, Eugene, a friend of her cat Shelley. And this rescue became the beginning of unusual meetings and adventures, thanks to which Martha not only found new friends, but also learned that the Black Scissors are the evil genius of Maestro Forbici, who invented the Cold River in order to capture and subjugate the whole world. And only Martha can stop him. The cover was generated by Kandinsky 2.2